In the early part of the Twentieth Century, the military leaders of America developed contingency plans to invade and conquer the various countries of the weakening British Empire. Color coded various shades of red, Warplan Crimson was the secret plan of battle with their neighbors to the north, the Dominion of Canada. Play out this "What if" scenario as the world's longest undefended border becomes the front lines of a war between Canada and the US.